Rotary pump.



PJCHRISTMAN.

ROTARY PUMP.-

APPUCATION FILED FEB- 19, 1917.

1,275,388. Patented Aug. 13, 1918.

2 SHEETS-SHEET lg?) 0 9 WW:

P. Cln'i stmam INVENTOR.

ATTORNEY.

P. CHRISTMAN.

ROTARY PUMP.

APPLICATION mco FEB.19, 1911.

Patented Aug.- 13, 1918.

2 SHEETS-SHEET 2- i. Ckristmam, INVENTOR.

BY A'QATTORNEY.

UNITED s TATEs PATENT OFFICE.

*rii'riin cHnIsTMAN, or GREEN Bat-Wisconsin.

no'rnny PUMP.

Application filed i ebruar 19, 191%. Serial 1%. 149,511

To all whom it may concern:

Be it known that I, PETER CHRIsTMAN, a citizen of the United States of America, residing at Green Bay, in the county of Brown and State of WVisconsin, have invented cer- 't'ainnew and useful Improvements in R0- tary Pumps, of which the following is a specification, reference being had therein to the accompanying drawing. 1 i

The invention relates to rotary pumps of the kind described 'in my Patent 'No.

It'is an object of the invention to provide a rotary pump with roller bearings, whereby friction is eliminated to a large extent and the efficiency of the pump is considerably enhanced.

A 'furtherobje'ct aims at the increase of thecapacity of the pump by enlarging the passage areas.

' It is also an object of the inventionto provide means for preventing back-flow of the fluid.

' Italso constitutes an object of the invention to provide certain details of constructlon and arrangement tendlng to increase the effectiveness and general desirability of a device of this particular character.

With these and other ob'ects in view, the preferred embodiment of t e invention consists in the novel combination and arrangement of parts particularly set forth in the following specification and illustrated inthe accompanylng drawing, in which' Figure 1 is a side elevation of the lower portion of this pump;

Figs. 2 and 3 are enlarged cross-sections on line -23 of Fig. 1, showing internal parts on different positions;

Fig. 1 is an enlarged section on line 44 of Fig. 1;

F ig. 5 is a vertical section of the pump;

Fig. 6 is a section on line 6--6 of Fig. 5;

'Fig. Tis a section on line 7--7 of Fig. 5;

Fig. 8 is a section on line 88 of Fig. 5, and

Fig. 9 isa perspective view of the piston in section, indicating a check valve.

Referring to the drawings, 1 designatesan upright cylinder provided with an eccentric bore 20 and with a series of inlet ports or openings 2 along one side thereof. The cylinder is closed at its lower end by a tubular member 3, which is formed at its upper end with a reduced portion 4 provided with external screw thread, which is the water on the bars 18.

received in threaded engagement in a coim-V tersunk opening of the cylinder. Within the tubular member 3 a plug 5 is' arranged, \vhichcompriscs a disk'6 closing the lower open end of the tubular member and a body member 6 integrally formed with said plate 1, and in registry with the true axis of the bore 20.

' As will be' seen by reference to Fig. 5, the cylinder, provided with the eccentric bore 20, surrounds a piston 11, which is arranged in concentric relation with' respect to the outside diameter of the cylinder and contacts with the cylinder wall just in ad- Vance-of the series of inlet ports, as may be readily seen by reference'to Figs. 2 and 3. The'lower end of the piston 11 enters thespace between the tubular member 3 and part 6 of the plug, and is adapted to rotate therein. In order-to diminish the'frictional resistance when the piston is rotated relative to the stationary plug 5, rollers 12 are interposed between the tubular member 3 and the piston, said rollers being maintained in spacedrelation by a plurality of retaining members 13 interconnected by ribs (Fig.

'8); The piston 11 is of tubular construction and surrounds the eccentric pin 10,

which serves as a pintle for a pair of abutments or wings 1 1 and 15, which are hinged at 16 to said pin, as may be readily seen by reference to Fig. 5. The wings 15 and '16 are dished or cut away at their front faces, as at 17, and have rounded outer edges to fit the cylinder. wall.' The outer edge bar 18, against which a plurality of sprlngs l9-act to maintain the bars in tight contact with the wall of the cylinder. A plurality of small holes 21 lead from the base of the spring hole to the'front face of the abutment so as to equalize the pressure of Specification of Letters Patent. Patented. Aug; 13, 191 8 of each wing is provided with a longitudinal groox e to receive a correspondingly shaped The length of the wings corresponds to the length of slots 22 and 23, and their thickness substantially is equal to the width of these slots. The radial dimensions of these wings are such that the latter extend from the pin outward to tight contact. with the cylinder wall, and this contact isconstantly maintained by reasonof thefa'ct that the pin 10 is concentrically arranged with respect to the eccentric bore 20 of the cylinder 1 and forms the axis about'which the wings are rotated, as will be hereinafter further explained. At the upper end of the piston a transverse member 24 is provided, which is secured in proper position within the piston by means of threaded members 25, and which is provided at its lower fac'ewith a bore '26, centrally arra ngedto'receive the upright portion 27 of'a crank 28, which continues ina horizontal piece toreceive in threaded engagement the upper end of the pin 10. The transverse member 24 forms a bridge and forces the waterto pass atthe left or "right side thereof, as viewed in Fig. 9. Above the transverse 'm'emb'er,'at proper distance therefromja pluralityof openings 29 are provided, in order to establish communication'between the interior and exterior of the piston 11. The piston 11 is closed up at its uppermost portion by a plug 30 having a centralsquare opening for the reception of the lower square end of a shaft 31, which, being connected in suitable inanner to a source of motive power, transmits rotary motion to the piston for a purpose hereinafter further specified.

The cylinder 1 at its upper end is formed with a reduced portion 32 having exterior threads to receive the lower end of a pipe 33, which serves for the discharge of the raised fluid. Between the piston and the discharge pipe the roller bearing 3% is provided, comprising a plurality of rollers maintained in spaced relation by retaining member 35, which, as will be seen by reference to Fig. 7, are so constructed as to provide passages for the fluid, as hereinafter further specified. The transverse member 2% serves as a support fora check valve and is provided at its upper side with a circular recess 35 for'the reception of the circular base portion of a check valve 36, which is adapted to be oscillated so as to close up selectively the aforementioned left or right passage obtained interiorly of the piston 11 reason of the pressure of said transverse member and the wings; By reference to Figs. 2 and 3, it may be seen that the cylinderwall is provided with a longitudinal recess 37, which forms, in addition to the interior passagethrough 'the'piston, an additional passage for the water.

The'operation of the pump is as follows: Rotary power being supplied to the member 26, the piston is rotated about an axis concentric to the outside diameter of the cylinder. The wings are thereby rotated about the pintle 10, eccentric to the outside diameter of the cylinder, but concentric to the eccentric bore of the cylinder, so as to be constantly in proper engagement with the cylinder Wall. The wing 14, after passing theseries of-inlet ports 2, creates a vacuum, and consequently water is drawn in through these openings by virtue of the fact that the pump issubmerged' in the Water. The further rotation of the'wings causes the following wing 14L to displace the water drawn in by the preceding" wing, and when the wings are in the'positioirshown in Fig. 3, the water forwardly of wing let can take two courses, as' indicated by the arrows. It flows interiorly of the piston byvi'rtueof thedisheLd front face, and alsdflows exteriorly thereof along the'cutaway portion37 of the cylinder wall. The Water thus rises in the twd'passages, -and is discharged through I the discharge'pipe provided for this purpose. The fluid rising in the inner passage of the piston actuates the check valve so as to close up'tlie passage not used; this effectively" prevents the water from flowing backf The provision of the roller bearings furthermore aids in driving the pump with considerable speed without affecting the efficiency or life of the pump. 7

VVhile- I have shown the preferred-embodiment of the invention, it is understood that I do not 'intendto confine myself to the exact details shown, but want to avail myself ofsuch departures, alterations, and changes as fairly fall within the scope of my invention, .as-pointed out in the ap-- pended claims.

I claim u 1. In arotary pump, an upright cylinder provided with a row of inlet openings along one side and being eccentric'ally bored, a plug closing the lower end; an outlet pipe leading upward from said "cylinder; an eccentric pin upst'andin gv from the plug a concentric rotary piston inclosingsaid pin and contacting withthe cylinder wall in advance of said row of openings, said pistQnT b'e-ing provided with upright slots; means leading to the outlet pipe for rotating said piston; and wingshinged on said pin and projecting-through said slots incontact wi-th"the cylinder wall, said piston and cylinder being arranged and formed to permit theflow of the fluid interiorly and exteriorly of said piston.

2. In a rotary pump, an upright cylinder provided with a row'of ports along one side and being eccentrically'bored, said cylinder beingclosed at itsupper' end; an outlet pipe connected to the upper end of said cylinder; a concentric rotarypiston contacting with the -cylinder wall in advance of said ports; a plurality of wings slidably propiston, said piston and cylinder being constructed and arranged to permit the flow of the fluid interiorly and exteriorly of said piston.

- 3. In a rotary pump, an upright cylinder provided with a row ofports along one side and being eccentrically bored, said cylinder being closed at its lower end; an outlet pipe connected to the upper end of said cylinder;

a concentric rotary piston contacting with the cylinder wall-in advance of said ports,

said piston communicating at its upper end with said outlet pipe; a plurality of wings slidably projecting through said piston and rotatable about an axis interior of and eccentric to said piston, and means for rotating said piston, said piston and cylinder being constructed and arranged to permit the flow of the fluid intericrly and exteriorly of said piston.

4. In a rotary pump, an upright cylinder provided with a row of ports along one side and being eccentrically bored, said cylinder being closed at its lower end; an outlet pipe connected to the upper end of said cylinder; a concentric rotary tubular piston contacting with the cylinder wall in advance of said ports, said piston communicating at its upper end with said outlet pipe and having upright slots; wings loosely projecting through said slots and being rotatable about an axis interior of but eccentric to said piston, said wings being dished at their front faces and in contact with the cylinder wall, the cylinder wall being bored out to provide a fluid passage exteriorly of said piston; and means for preventing the return flow of the raised fluid.

5. In a rotary pump, an upright cylinder provided with a row of ports along one side and being eccentrically bored, said cylinder being closed at its lower end, an outlet pipe connected to the upper end of said cylinder; a concentric rotary tubular piston contacting with the cylinder wall in advance of said ports, said piston communicating at its upper end with said outlet pipe and having upright slots; wings loosely projecting through said slots and being rotatable about an axis interior of but eccentric to said piston, said wings being dished at their front faces and in contact with the cylinder wall, the cylinder wall being bored out to provide a fluid passage exteriorly of said piston, and fluid operated means for preventing the return flow of the raised fluid.

6. In a rotary pump, an upright cylinder provided with a row of ports along one side and being eccentrically bored, said cylinder 7 being closed at its lower end; an outlet pipe connected to the upper end of said cylinder; a concentric rotary tubular piston contacting with the cylinder wall inadvance of said ports, said piston communicating at its upper end with said outlet pipe-and hav ing upright slots; wings loosely projecting throughsaid slots and being rotatable about an axis interior of but eccentric to said piston, said wings being dished at their front faces and in contact with the cylinder wall, the cylinder Wall being bored out to provide a fluid passage exteriorly of said piston;

and means secured to said piston and actuated by the fluid to prevent the return flow of the raised fluid. 7

7. In a rotary pump, an upright cylinder provided with a row'of ports along one side and being ecc'entrically bored, said cylinder being closed at its lower end; an outlet pipe connected to the upper end'of said cylinder; a concentric rotary tubular piston contacting with the cylinder wall in advance of said ports, said piston communicating at its upper end with said outlet pipe and having upright slots; wings pro ecting through said slots in contact with the cylinder wall and being rotatable about an axis interior of but eccentric to said piston, said wings being dished at their front faces and defining fluid passages in said piston, said cylinder being bored out to provide an additional passage exterior of said piston; and a check valve oscillatorily secured to said piston and actuated by the raised fluid.

8. In a rotary pump, an upright cylinder provided with a row of ports along one side and being eccentrically bored; a plug closing the lower end; an outlet pipe connected to the upper end of said cylinder; an eccentric pin upstanding from said plug; a concentric rotary piston i'nclosing said pin and conlower end; and means for retaining saidfl rollers inoperative position.

9. In a rotary pump, an upright cylinder provided with a row of ports along one side and being eccentrically bored, the cylinder being closed at its lower end; an outlet pipe connected to the upper end of said cylinder; a concentric rotary piston contacting with the cylinder wall in advance of said ports,

7 said piston communicating at its upper end with said outlet pipe and having upright slots; wings projecting through said slots in contact with the cylinder wall and being rotatable about an axis interior of but eccentric to said piston, said wings being dished at their front faces and spacing off fluid passages in' said piston, said cylinder being bored out to provide an additional passage exterior of said piston; an oscillating valve controlling said piston passages; roller bearings interposedbetween thepiston and cylinder atthe upper and 'lOW61"6IId ;and means for" retaining the rollers in '-operative-"position.

10. In a rotary pump; an upright cylinder provided with a row-0fports along one side and being {eccentrically' bored,- the' cylinderbeingclosed at its lower'end; an outlet pipe connected to-th'e upper-end ofs'aid cylinder; a concentric rotary piston contactingwith the cylinder-Wall in-"advanceofssaid ports, said piston communicating at-itsupper end with said outlet pipe and'having upright slots; "Wings projecting through said slots -in contact 'With the cylinder Wallv and being-rotatable 'about'an axis interior of but passage exterior of said piston; anoscillat- =1ng valve controlllng sa1d-p1ston-p'assages;

roller bearings interposed between the-piston and-cylinder at the upper and--1ower end; and means folreturning the-rollersin operative position said means being constructed to permit the passage of-therfluid at the upper endbetween said piston and cylinder, substantially as described. I

In tGSt'lIHOIIY'WhBIBOf I hereunto a'lfix'my signature.

PETER CHRI STMAN;

* flopies ofthispatentmay-meobtainedfor-fivcents each, by addressing-the Commissioner of Patents, 'washingtomnc." 

